84,348 research outputs found
Trends in Russian research output indexed in Scopus and Web of Science
Trends are analysed in the annual number of documents published by Russian
institutions and indexed in Scopus and Web of Science, giving special attention
to the time period starting in the year 2013 in which the Project 5-100 was
launched by the Russian Government. Numbers are broken down by document type,
publication language, type of source, research discipline, country and source.
It is concluded that Russian publication counts strongly depend upon the
database used, and upon changes in database coverage, and that one should be
cautious when using indicators derived from WoS, and especially from Scopus, as
tools in the measurement of research performance and international orientation
of the Russian science system.Comment: Author copy of a manuscript accepted for publication in the journal
Scientometrics, May 201
Filamentous phages as building blocks for reconfigurable and hierarchical self-assembly
Filamentous bacteriophages such as fd-like viruses are monodisperse rod-like
colloids that have well defined properties: diameter, length, rigidity, charge
and chirality. Engineering those viruses leads to a library of colloidal rods
which can be used as building blocks for reconfigurable and hierarchical
self-assembly. Their condensation in aqueous solution \th{with additive
polymers which act as depletants to induce} attraction between the rods leads
to a myriad of fluid-like micronic structures ranging from isotropic/nematic
droplets, colloid membranes, achiral membrane seeds, twisted ribbons,
-wall, pores, colloidal skyrmions, M\"obius anchors, scallop membranes to
membrane rafts. Those structures and the way they shape shift not only shed
light on the role of entropy, chiral frustration and topology in soft matter
but it also mimics many structures encountered in different fields of science.
On one hand, filamentous phages being an experimental realization of colloidal
hard rods, their condensation mediated by depletion interactions constitutes a
blueprint for self-assembly of rod-like particles and provides fundamental
foundation for bio- or material oriented applications. On the other hand, the
chiral properties of the viruses restrict the generalities of some results but
vastly broaden the self-assembly possibilities
Four Decades of Computing in Subnuclear Physics - from Bubble Chamber to LHC
This manuscript addresses selected aspects of computing for the
reconstruction and simulation of particle interactions in subnuclear physics.
Based on personal experience with experiments at DESY and at CERN, I cover the
evolution of computing hardware and software from the era of track chambers
where interactions were recorded on photographic film up to the LHC experiments
with their multi-million electronic channels
Hidden attractors in fundamental problems and engineering models
Recently a concept of self-excited and hidden attractors was suggested: an
attractor is called a self-excited attractor if its basin of attraction
overlaps with neighborhood of an equilibrium, otherwise it is called a hidden
attractor. For example, hidden attractors are attractors in systems with no
equilibria or with only one stable equilibrium (a special case of
multistability and coexistence of attractors). While coexisting self-excited
attractors can be found using the standard computational procedure, there is no
standard way of predicting the existence or coexistence of hidden attractors in
a system. In this plenary survey lecture the concept of self-excited and hidden
attractors is discussed, and various corresponding examples of self-excited and
hidden attractors are considered
Solitons in Ideal Optical Fibers - A Numerical Development
This work developed a numerical procedure for a system of partial
differential equations (PDEs) describing the propagation of solitons in ideal
optical fibers. The validation of the procedure was implemented from the
numerical comparison between the known analytical solutions of the PDEs system
and those obtained by using the numerical procedure developed. It was
discovered that the procedure, based on the finite difference method and
relaxation Gauss-Seidel method, was adequate in describing the propagation of
soliton waves in ideals optical fibers.Comment: Article accepted for publication in Semina: Ci\^encias Exatas e
Tecnol\'ogica
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